ELECTRIC BRAIN POTENTIALS-EVOKED BY PICTURES OF FACES AND NON-FACES - A SEARCH FOR FACE-SPECIFIC EEG-POTENTIALS
ELECTRIC BRAIN POTENTIALS-EVOKED BY PICTURES OF FACES AND NON-FACES - A SEARCH FOR FACE-SPECIFIC EEG-POTENTIALS
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DOI：
10.1007/bf00274992
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发表时间：
1989-01-01
影响因子：
2
通讯作者：
GRUSSER, OJ
中科院分区：
文献类型：
--
作者：
BOTZEL, K;GRUSSER, OJ
在三个不同的实验系列中，记录了29名成人受试者(19名女性，10名男性)由图形模式变化引起的脑电反应。对电极T5、T6、Cz、Pz(10-20系统)的诱发反应进行了定量数据评估。刺激被投射到4×6度的双目视野。实验模式(1)：采用白底黑白(P刺激)或黑底白底(N刺激)的画法，每组共160张幻灯片，按半随机顺序排列。在Cz和Pz，由面部刺激诱发的典型脑电反应显示出三个显著的峰值，对于P刺激和N刺激非常相似。P150峰值在对面部刺激的反应中尤其明显，但在椅子或树木刺激引起的诱发电位中则没有。样本(2)：54张不同人脸、53个不同花瓶和53双不同鞋子的4×6度幻灯片(黑白照片)按照范式(1)被投射，但在假设的后测记忆任务中，对受试者的指导提高了他们的注意力。“面孔反应”成分(早期的N140-160，P210-240，N300)在女性比男性更明显，同样在电极捷克最明显。范式(3)：当识别任务包括在范式(2)中时--192个条目中的9个在记录过程前20分钟被记忆--获得与(2)基本相同的诱发电位，但在对所有刺激的反应中出现额外的晚期正波(450-600ms)。我们假设“特定于面部的”成分--考虑到非面部刺激的数量有限而谨慎使用--不是起源于颞枕皮质脸部区域，而是起源于颞叶深处的边缘结构(杏仁核、海马体)或扣带回。在本研究中，在诱发反应中没有发现显著的半球差异(T5、T6)(所有刺激类别)，但已知这种差异在高度图式的面部刺激中出现。
In three different experimental series, electroencephalographic responses evoked by changes in pictorial patterns were recorded in 29 adult human subjects (19 females, 10 males). Quantitative data evaluation for the evoked responses from electrodes T5, T6, Cz, Pz (10–20 system) was performed. The stimuli were projected to a 4 × 6 degree binocularly viewed field. The patterns changed within 6 ms every 2.5–4.5 s according to a random program.Paradigm (1): Identicalline drawingsof a face, a tree and a chair were used, either black on white (P-stimuli) or white on black (N-stimuli); in each set altogether 160 slides appeared in semi-random order. At Cz and Pz a prototypical EEG-response evoked by face stimuli was found exhibiting 3 prominent peaks, very similar for P-stimuli and N-stimuli. A P150 maximum was especially pronounced in the responses to face stimuli but absent in the evoked potentials aroused by chair or tree stimuli. The difference curves (face-chair, face-tree, chair-tree) supported the hypothesis of “face-responsive” components in these responses.Paradigm (2): 4×6 degree slides (black and white photographs) of 54 different human faces, 53 different vases and 53 different pairs of shoes were projected as in paradigm (1), but instruction to the subjects on a supposed post-test memory task raised their attention during the recordings. “Face-responsive” components (an early N 140–160, P 210–240, N 300) were more marked in female than in male subjects, and again most pronounced at electrode Cz.Paradigm (3): When a recognition task was included in paradigm (2) — 9 out of 192 items were memorized 20 minutes before the recording session — essentially the same evoked potentials were obtained as in (2), but an additional late positive wave (450–600 ms) appeared in the responses to all stimuli. We assume that the “face-specific” components — a designation which is used cautiously considering the limited number of non-face stimuli — do not originate in the temporo-occipital cortical face region, but in limbic structures (amygdala, hippocampus) deep in the temporal lobe or in the gyrus cinguli. In the present study no significant hemispheric differences (T5, T6) in the evoked responses were found (all stimulus categories), but such differences are known to appear with highly schematic face stimuli.